Get distinct values from list

Question

    public List<MAS_EMPLOYEE_TRANSFER> GetEmployeeTransferListForHR(TimecardDataContext TimecardDC)
    {
        List<MAS_EMPLOYEE_TRANSFER> objEmployeeTransferList = null;
        try
        {
            objEmployeeTransferList = new List<MAS_EMPLOYEE_TRANSFER>();
            objEmployeeTransferList = TimecardDC.MAS_EMPLOYEE_TRANSFER.Where(
                employee =>
                    employee.HR_ADMIN_IND=="Y").ToList();                
        }
        finally
        {
        }
        return objEmployeeTransferList;
    }

It shows all list of values where hr admin indicator=yes. But I have to get hr admin=yes and distinct(empid) from the table MAS_EMPLOYEE_TRANSFER. How to get distinct empId from the the objEmployeeTransferList.

Try doing `groupby`empId and then selecting. have a look [LINQ Select distinct from a List?](http://stackoverflow.com/questions/7572006/linq-select-distinct-from-a-list) will help you — huMpty duMpty, Feb 26 '13 at 10:18
Check out this question: http://stackoverflow.com/questions/912188/linq-distinct-by-name-for-populate-a-dropdown-list-with-name-and-value — default locale, Feb 26 '13 at 10:20

score 6 · Answer 1 · edited May 23 '17 at 10:28

6

Have try making it

.Distinct().ToList();

You can refer here LINQ: Distinct values

edited May 23 '17 at 10:28

Community

1
1

answered Feb 26 '13 at 10:19

c0dem0nkey

616
4
13

it is not working for me . i want do same in C# object list . – Vivek Shukla Jun 29 '17 at 10:50

score 4 · Accepted Answer · answered Feb 26 '13 at 10:18

4

List<int> ids = objEmployeeTransferList
                   .Select(e => e.empId)
                   .Distinct()
                   .ToList();

Also you can make this on server side without creating in-memory employee list with all admin records:

List<int> ids = TimecardDC.MAS_EMPLOYEE_TRANSFER
                   .Where(e => e.HR_ADMIN_IND == "Y")
                   .Select(e => e.empId)
                   .Distinct()
                   .ToList();

answered Feb 26 '13 at 10:18

Sergey Berezovskiy

232,247
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459

After getting that list from objEmployeeTransferList. And then only i have to filter by distict(empid). how i have to do that. – Ayyappan Sekaran Feb 26 '13 at 10:31
@SaiAyyappsSekaran first sample gets unique ids from objEmployeeTransferList – Sergey Berezovskiy Feb 26 '13 at 10:45

score 3 · Answer 3 · answered Nov 05 '19 at 12:06

3

Get Distinct using GroupBy

objEmployeeTransferList.GroupBy(x => x.empId).Select(g => g.First()).ToList();

answered Nov 05 '19 at 12:06

Kiran Solkar

1,204
4
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score 0 · Answer 4 · answered Feb 26 '13 at 10:19

0

Have you try:

objEmployeeTransferList = TimecardDC.MAS_EMPLOYEE_TRANSFER.Where(
   employee => employee.HR_ADMIN_IND=="Y").Distinct().ToList();

answered Feb 26 '13 at 10:19

Habibillah

27,347
5
36
56

score 0 · Answer 5 · answered Feb 26 '13 at 10:20

0

There is a distinct method in linq which should do the trick.

http://msdn.microsoft.com/en-gb/library/bb348436.aspx

answered Feb 26 '13 at 10:20

lparry

86
3

Get distinct values from list

5 Answers5

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